chore: mini-openclaw 初始版本

Next.js 前端 + FastAPI/LangChain 后端透明 agent平台
- 含 .gitignore, 敏感文件(sessions数据/.env/venv等)已排除
- 待后续添加 trajectory 自进化机制

backend/requirements.txt

@@ -0,0 +1,27 @@
+fastapi>=0.110.0
+uvicorn[standard]>=0.27.0
+sse-starlette>=2.0.0
+python-dotenv>=1.0.0
+pydantic>=2.0.0
+
+# LangChain
+langchain>=1.0.0
+langchain-openai>=0.3.0
+langchain-deepseek>=0.1.0
+langchain-community>=0.3.0
+langchain-experimental>=0.3.0
+langgraph>=1.0.0
+
+# LlamaIndex
+llama-index-core>=0.12.0
+llama-index-embeddings-openai>=0.3.0
+llama-index-retrievers-bm25>=0.4.0
+
+# Token counting
+tiktoken>=0.7.0
+
+# Tools
+html2text>=2024.2.26
+beautifulsoup4>=4.12.0
+requests>=2.31.0
+pyyaml>=6.0.0